Condenser



P. THOMAS.

CONDENSER.

`APPLICATION FILED JUNE l5, i917.

1, 35 1 ,074. Patented Aug. 31, 192.0.

INVENTOR ATTORNEY 'UNITED s'i'ATEs PATENT. oi-Fics raum-Ps moms, or nnenwoon PARK,

PENNSYLVANIA, ASSIGNOR T0 WESTUVG- HOUSE ELECTRIC & MANUFACTURING COMPANY, A. CORPORATION F PENNSYL- GNDENSER.

1,351,074. Specification of Letters Patent. Patented Aug, 319 1920,

application mea June 15, 1917. serial No. 175,047.

, To all whom t may concern i Be it known that I, PHILLIPS THOMAS, a

citizen of the United States, and a resident of Edgewood Park, inthe county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Condenser-s, of which the following is a specification.

My invention relates to static electric condensers andit has for its object to provide a 'condenser which shall have high electrostatic capacity in proportion to its plate area and dimensions and which shall have high dielectric strength and resistance to temperv ature variations, these desirable properties being obtained 'by the use of Adielectric material containing montan wax or montanic acidl as an essential ingredient.

Electrostatic condensers of the kind to whichl my present invention .relates have heretofore been commonly constructed with dielectric material containing paraiiin wax as the principal insulating constituent. On

' account of the relatively low specific inducdensers of this tive capacity of paraihn wax and also on actempts have been made to improve contiype by utilizing other waxy bodies instead o arain wax. AChlorinated bodies, such as t e polychlorinated derivatives of naphthalene, have been largely used as substitutes for paraffin wax for?? this purose, but these chlorinated closed chain hyrocarbons have certain disadvantages, and

in particular, are found to injure the workdiseases.

According to my present invention, I provide an electrostatic condenser 'of high capacity and od mechanical` characteristics by the use o montan wax as the constituent of the dielectric. Montan* wa or lignite wax2 is a natural wax obtained y extract' lignite or peat with suitable solvents an consists of fatty acids and a hydrocarbon constituent, 'the fatty vacid portion lbeing composed mainly of montanic acid CH5BO2.

men who handle them, causing serious skin This wax melts between 80 and 86 C. and

has a specific inductive capacity of 4 to 4.5. These properties are the distinctive superior of the corresponding properties of paran wax which melts between 40 and 60 C. and has a specic inductive capacity of 2 to 3. l The drawing is a sectional view conventionally showing an electric condenser of the so-called stacked type embodying my invention, in which the condenser proper may icomprise a plurality of layers of metallic foil l and interposed layers 2 of any suitable absorbent dielectric material, such as paper or the like, impregnated with montan wax or montanic acid. My invention, however, is in no way to be limitedto the specific illustration of the drawing.

I employ crude or refined montan wax, or the `montanic acid derived from montan wax, as an impregnating medium in electrostatic condensers in exactly which araiiin wax is utilizedk and in all of the -d-i erent forms of condensers in which waxy dielectric bodies are used. The specificV construction of the condenser is therefore the same way in immaterial so -far as my present invention is ,A

in impregnating. paper with thewax either v .by means of suitable solvents or by immersing the `paper in the melted wax, laminatioiis of thev impregnated paper being alternatedwith laminations of tin foil or other suitable conducting material. Thelaminations ofdielectric material and tin foil may either be cut out and alternately stacked one upon the other or strips of the two materials may beplaced together and rolled up in accor ance with the usual method of makingrolled condensers. Since my invention contemplates the use of montan wax in all electrostatic apparatus where waxy dielectric ma- ,terials are used, I desire that no limitations as to structure or methods of use beimposed upon my invention, the scope of which is set forth inthe appended claims.

-v I claim as my invention l. An electric condenser unitA includ' superimposed vlayers of conductlgmateria F having a dielectric comprisin montan wax 1 disposed between the ad] acent ayers.

2. An electric condenser having a dielectric comprising absorbent material impregnated with montan wax.

3. n; electric condenser having a dielectric comprising librous absorbent material impregnated with montan Wax.

Y 4. Anelectric condenser having a dielectric comprising paper impregnated with montan Wax. f

5. An electric condenser unit includin superimposed layers of conducting material having a dielectric comprising montanic acid disposed between the adjacent layers.

6. An electric condenser having a di tric comprising absorbent material impregnated With a dielectric substance containing montanic acid.

tric comprising paper impregnated with a dielectric lsubstance containing montanic 1 acid.

8. An electric condenser including 'alternate sheets of conducting material and dielectric material, the dielectric material comprising sheets of paper impregnated with montan Wax.

ln testimony whereof, ll have hereunto subscribed my name this 31st day of May, 1917. 

